Up-/downconversion luminescence in Gd2O3:Yb3+/Er3+ nanocrystals: Emission manipulation and energy transfer phenomena

Up-/downconversion luminescence in Gd2O3:Yb3+/Er3+ nanocrystals: Emission manipulation and energy transfer phenomena
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Gd2O3:Yb3 /Er3 纳米晶体中的上/下转换发光:发射操纵和能量转移现象

DOI:
10.1016/j.jlumin.2018.10.074
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发表时间:
2019-02
影响因子:
3.6
通讯作者:
Lizhen Long
Lizhen Long
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Jun Liu;Huawei Deng;Fengzhen Lv;Wenjie Kong;Dihu Chen;Fuchi Liu;Lizhen Long

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镧系元素离子可用的大量能级使得镧系元素掺杂发光材料的发射机制极其复杂。在此,我们重点讨论和分析了Gd2O3:Yb3+/Er3+纳米晶体的发光操纵,系统地研究了上转换和下转换过程中离子-离子相互作用引起的能量转移,以揭示操纵机制,表明上述纳米晶体的发光可以通过改变Yb3+的含量来控制。根据Dexter的能量转移理论以及Er3+离子的激发导致Yb3+在近红外区域(950-1100nm)的2F5/2→2F7/2跃迁导致发射的出现,这种行为归因于从Er3+到Yb3+的能量转移的发生。
The large number of energy levels available to lanthanide ions makes the emission mechanism of lanthanide-doped luminescent materials extremely complicated. Herein, we focus on the discussion and analysis of luminescence manipulation in Gd2O3:Yb3+/Er3+nanocrystals and systematically investigate ion-ion interaction–induced energy transfer in up- and downconversion processes to shed light on the manipulation mechanism, showing that the luminescence of the above nanocrystals can be controlled by varying the content of Yb3+. Based on Dexter's energy transfer theory and the fact that excitation of Er3+ions results in the appearance of emission attributed to the2F5/2→2F7/2transition of Yb3+in the near-infrared region (950–1100 nm), this behavior is ascribed to the occurrence of energy transfer from Er3+to Yb3+.
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